Spirulina is one of the most popular supplements on the planet loaded with so many nutrients beneficial for the brain and body. Basically, spirulina is an organism growing in fresh and saltwater. It is a kind of cyanobacteria from a single-celled microbes’ family also known as blue-green algae. Like plants, cyanobacteria produce energy through the process of photosynthesis. Spirulina contains proteins, amino acids, copper, iron, vitamins like B1, B2, B3, and minerals like potassium, magnesium, and manganese.